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Jul 14, 2025 · 1 min read · function outerFunction() { const outerVariable = 'I am from outerFunction'; function innerFunction() { const innerVariable = 'I am from innerFunction'; console.log(outerVariable); // Accesses `outerVariable` from the outer function's scope console.lo...
Join discussionJul 14, 2025 · 1 min read · TDZ (Temporal Dead Zone) is the time between when a variable is hoisted and when it’s actually declared in your code - during that time, you can’t use the variable, or you'll get a ReferenceError Explanation console.log(a); // ReferenceError (TDZ of ...
Join discussionJul 13, 2025 · 2 min read · When you call a function in JS like this: function greet(name) { let message = "Hello, " + name; return message; } greet("Shubhradeep"); ✅ name and message are stored in the call stack (temporary memory). The reference to the heap string ("Hello, Shu...
Join discussionJul 13, 2025 · 1 min read · Traditionally, JavaScript was interpreted line-by-line by browsers, making it super flexible and dynamic. But modern JS engines, like V8, now use JIT (Just-In-Time) compilation, combining the best of both worlds - speed and flexibility! So yeah, JS s...
Join discussionJul 13, 2025 · 1 min read · ✅ YES! JavaScript runs on one thread only- it has just one call stack, so it handles one task at a time. But thanks to the event loop, Web APIs, and the callback queue, it can manage async stuff like timers and API requests without blocking the main ...
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